Standard AK call/call/raise line HU?

[DontRaisePlz]

PokerStars 1/2 Hold'em (10 handed) converter

Preflop: Hero is MP1 with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">4 folds</font>, SB calls, <font color="#666666">1 fold</font>, UTG+2 calls.

Flop: (7 SB) A[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, UTG+2 folds, Hero calls.

Turn: (4.50 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

River: (6.50 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">SB 3-bets</font>, Hero calls.

Final Pot: 12.50 BB

Its like a hand straight out of HEFAP. Guy got pwned on a funny hand with a JTKQ9 board where two people sandwich raised him with aces while he called down with JT. He's terrible. I think he's a pretty loose bettor considering what he kept betting on that hand.

3-bet on the river scares me, hopefully he's tilting from the last hand (the JT hand). Thoughts?